John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.
Wallpaper Cycler - NuonSoft WallpaperCycler is a powerfull utility to manage all your wallpapers and to automatically cycle between your wallpapers.
VC Starter Kit - Everything you need to look like a Venture Capitalist